中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 深海科学与工程研究所
  3. 中国科学院深海科学与工程研究所
  4. 深海科学研究部
  5. 深海地球物理与资源研究室
Spatiotemporal Seismotectonic Implications for the Izu-Bonin-Mariana Subduction Zone from b-Values

文献类型：期刊论文

作者Gui, Zhou4; Bai, Yongliang4; Wang, Zhenjie4; Dong, Dongdong3; Wu, Shiguo2; Li, Tongfei1
刊名SEISMOLOGICAL RESEARCH LETTERS
出版日期2020-05-01
卷号91期号:3页码:1679-1693
ISSN号0895-0695
DOI10.1785/0220190356
英文摘要Studies on the physical properties of the entire Izu-Bonin-Mariana (IBM) subduction zone contribute to comprehensive seismotectonic understanding and earthquake potential assessment, especially given previous controversial conclusions. Determining seismic bvalue is a method that has been used for other regions and is adopted here to study the spatiotemporal variations along the IBM system. Based on the frequency-magnitude distribution relation log(10) (N) = a-bM, b-values are mapped within the subduction zone using earthquakes with M-w >= 2 after 2005. The b-value anomalies in cross sections indicate detailed seismotectonic characteristics against the regional geological background. The common characteristics from north to south: (1) regional high b-values at shallow depths in the overriding are associated with relatively low temperatures in thermal model, the bottom half of which correspond with highly serpentinized mantle wedge; and (2) low b-values at intermediate depths are associated with high temperatures along the primarily heated hydrated slab. In the Izu-Bonin segment, low b-values around the slab deflection at deep depths respond to stress buildup and shearing instability of meta-stable olivine in primarily heated hydrated slabs. In the Mariana segment, high b-values beneath the volcanic region at depths from the surface to 50 km and between 50 and 100 km are associated with extension and volcanism and the melting region, respectively. Temporal b-value variations indicate regional changes before and after large events for further seismic risk analysis. Stress drops of large intermediate and deep earthquakes are negligible to local stress state in strong flexure of the incoming slab. The rupture zone around the Pagan region at an approximate depth of 200 km and the region around the rifting-spreading transition in the northern Mariana trough at depths between 180 and 350 km are areas for potential large earthquakes.
WOS关键词DOUBLE SEISMIC ZONE ; FREQUENCY-MAGNITUDE DISTRIBUTION ; DEEP-FOCUS EARTHQUAKE ; VALUE ANOMALIES ; SEAMOUNT SUBDUCTION ; PACIFIC PLATE ; DEPTH ; SLAB ; BENEATH ; STRESS
资助项目National Natural Science Foundation of China[U1701245] ; Fundamental Research Funds for the Central Universities of China[18CX02064A] ; Open Fund of the State Key Laboratory of Earthquake Dynamics[LED2019B01] ; Qingdao National Laboratory for Marine Science and Technology Foundation[QNLM2016ORP0401]
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000530707300034
出版者SEISMOLOGICAL SOC AMER
资助机构National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities of China ; Open Fund of the State Key Laboratory of Earthquake Dynamics ; Qingdao National Laboratory for Marine Science and Technology Foundation
源URL[http://ir.idsse.ac.cn/handle/183446/7573]  
专题深海科学研究部_深海地球物理与资源研究室
通讯作者Bai, Yongliang
作者单位1.Wuhan Ctr Geol Survey CGS, Wuhan, Peoples R China
2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Peoples R China
3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China
4.China Univ Petr East China, Coll Oceanog & Space Informat, Qingdao, Peoples R China
推荐引用方式
GB/T 7714		 Gui, Zhou,Bai, Yongliang,Wang, Zhenjie,et al. Spatiotemporal Seismotectonic Implications for the Izu-Bonin-Mariana Subduction Zone from b-Values[J]. SEISMOLOGICAL RESEARCH LETTERS,2020,91(3):1679-1693.
APA Gui, Zhou,Bai, Yongliang,Wang, Zhenjie,Dong, Dongdong,Wu, Shiguo,&Li, Tongfei.(2020).Spatiotemporal Seismotectonic Implications for the Izu-Bonin-Mariana Subduction Zone from b-Values.SEISMOLOGICAL RESEARCH LETTERS,91(3),1679-1693.
MLA Gui, Zhou,et al."Spatiotemporal Seismotectonic Implications for the Izu-Bonin-Mariana Subduction Zone from b-Values".SEISMOLOGICAL RESEARCH LETTERS 91.3(2020):1679-1693.

入库方式： OAI收割

来源：深海科学与工程研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。